替換字符串中的多個子字符串

Question

該函數用於用相應的值替換字符串中的某些子字符串。

//地圖（string_to_replace，string_to_replace_with）

String template = "ola ala kala pala sala"; 
StringBuilder populatedTemplate = new StringBuilder(); 
HashMap<String, String> map = new HashMap<>(); 
map.put("ola", "patola"); 
map.put("pala", "papala"); 

int i=0; 
for (String word : template.split("'")) { 
    populatedTemplate.append(map.getOrDefault(word, word)); 
    populatedTemplate.append(" "); 
} 

System.out.println(populatedTemplate.toString()); 

此上述功能工作正常，如果要被替換字符串爲「「（空格）所包圍。

Ex- String =>「嘿{how} are $ = you」 如果要替換的子字符串是「嗨」或「你」，那麼它工作正常。問題是我想要替換「如何」和「你」。

如何在不增加複雜度的情況下實現這一目標？

Answer 1

我要替換隻是你在地圖上，並保持休息，因爲它是的話，你可以繼續爲下一個：

String template = "Hey {how} are $=you"; 
StringBuilder populatedTemplate = new StringBuilder(); 
Map<String, String> map = new HashMap<>(); 
map.put("how", "HH"); 
map.put("you", "YY"); 
// Pattern allowing to extract only the words 
Pattern pattern = Pattern.compile("\\w+"); 
Matcher matcher = pattern.matcher(template); 
int fromIndex = 0; 
while (matcher.find(fromIndex)) { 
    // The start index of the current word 
    int startIdx = matcher.start(); 
    if (fromIndex < startIdx) { 
     // Add what we have between two words 
     populatedTemplate.append(template, fromIndex, startIdx); 
    } 
    // The current word 
    String word = matcher.group(); 
    // Replace the word by itself or what we have in the map 
    populatedTemplate.append(map.getOrDefault(word, word)); 
    // Start the next find from the end index of the current word 
    fromIndex = matcher.end(); 
} 
if (fromIndex < template.length()) { 
    // Add the remaining sub String 
    populatedTemplate.append(template, fromIndex, template.length()); 
} 
System.out.println(populatedTemplate); 

輸出：

Hey {HH} are $=YY 

回覆更新：

假設您希望能夠替換不僅單詞而且ything像${questionNumber}，您將需要動態創建的正則表達式是這樣的：

String template = "Hey {how} are $=you id=minScaleBox-${questionNumber}"; 
... 
map.put("${questionNumber}", "foo"); 
StringBuilder regex = new StringBuilder(); 
boolean first = true; 
for (String word : map.keySet()) { 
    if (first) { 
     first = false; 
    } else { 
     regex.append('|'); 
    } 
    regex.append(Pattern.quote(word)); 
} 
Pattern pattern = Pattern.compile(regex.toString()); 
... 

輸出：

Hey {HH} are $=YY id=minScaleBox-foo